-
-
-
-
-
Display device
-
Patent number 4,904,989
-
Issue date Feb 27, 1990
-
Hitachi, Ltd.
-
Makoto Matsui
-
G02 - OPTICS
-
Imaging display device
-
Patent number 4,583,122
-
Issue date Apr 15, 1986
-
Hitachi, Ltd.
-
Junichi Ohwada
-
G02 - OPTICS
-
-
Photosensor
-
Patent number 4,307,372
-
Issue date Dec 22, 1981
-
Hitachi, Ltd.
-
Makoto Matsui
-
H01 - BASIC ELECTRIC ELEMENTS
-
Photo-sensor
-
Patent number 4,233,506
-
Issue date Nov 11, 1980
-
Nippon Telegraph and Telephone Public Corporation
-
Hideaki Yamamoto
-
G06 - COMPUTING CALCULATING COUNTING
-
Photo-sensor
-
Patent number 4,227,078
-
Issue date Oct 7, 1980
-
Nippon Telegraph and Telephone Public Corporation
-
Hideaki Yamamoto
-
G06 - COMPUTING CALCULATING COUNTING